A swirl or twist in the grain of the wood which usually occurs near a knot, at a branch crotch or at some other point of structural stress in the tree. True burl may have inherent structural weaknesses and should only be used in flooring with great caution.
A burl (or burr) is a growth on the side of a tree or sometimes on a root. These burls are characterized by wild grain swirls and 'eyes' that are dramatic and quite attractive. No one really knows what causes burls but some think that it is similar to a cancerous growth. But burls do not appear to harm the tree. Domestic burls are moderately priced - as woods go - ranging from $10 to $30 (2004) for a board foot.
large, dense, heavy, frequently gnarly outgrowths on trees (e.g. walnut) whose fancy, compressed grain figures, when sliced, make them ideal for exotic wood veneers; commonly used as decorative material on the consoles and dashboards of expensive automobiles; burls frequently are harvested during the process of cutting down dead trees for guitar tonewood.
( Ella Megalast Burls Forever): n. [Middle English burle from Old French bourle, tuft of wool, diminutive of bourre, coarse wool. from the Latin burra, shaggy garment.] 1. A knot, lump, or slub in yarn or cloth. 2. a. A large rounded outgrowth on a tree trunk or branch. b. The strongly marked wood from such an outgrowth used as veneer.â€”vt. burled, burling, burls. To finish (cloth) by removing loose threads or burls.
A term for veneers which are produced from the burr or burl formation. Differentiation is generally made between burl or burr growth above ground (Elm, Ash, Oak) and root burl or burr growth which develops below ground in the root (Californian Walnut, Madrona, Vavone, Myrtle).
A figure created by abnormal growth, or response to injury, that forms an interwoven, contorted, or gnarly mass of dense woody tissue on the trunk or branch or the tree. Burls are usually small and characterized by eye-like marking surrounded by swirls and clusters of distorted tissues.
1. A hard, woody outgrowth on a tree, more or less rounded in form, usually resulting from the entwined growth of a cluster of buds. Such burls are the source of the highly figured burl veneers used for purely ornamental purposes. 2. In lumber or veneer, a localised severe distortion of the grain generally rounded in outline.
A burl is a wart like growth, probably caused by some injury to the growth layer. In the process of “healing”, there may be very abnormal growth and accumulation of undeveloped buds to eventually form this burl, which may very in size from a few inches (of no veneer value) to a tremendous, somewhat oval growth weighing as much as two tons. Burls figure results from rotary cutting this growth, and the general appearance is a close arrangement of many small “eyes’ with much distorted grain appearance intermingled. Burls are common mostly to a few species, including Walnut, Myrtle, Redwood (California, that is), Elm (European), Madrone, Ash and Mappa (European Poplar). (example)
A swirl, twist, or distortion in the grain of the wood which usually occurs near a knot or crotch. A burl can often be associated with abrupt color variations and/or a cluster of small dark piths caused by a cluster of adventitious buds.